Unsolicited ideas, the non-contractual and voluntary submission of innovation-related information from external sources to the firm, hold the promise of becoming an almost costless and limitless font for firms’ innovative efforts. In contrast, in this paper, we analyze the difficulties...

We review the contribution and evolution of open innovation since the publication of Chesbrough’s 2003 Open Innovation book, and suggest likely directions going forward. We link the articles of this special issue to three key trends in open innovation research: better measurement, resolving...

As with all new ideas, the concept of Open Innovation requires extensive empirical investigation, testing and development. This paper analyzes Procter and Gamble's 'Connect and Develop' strategy as a case study of the major organizational and technological changes associated with open...